We did a experiment in class to recognize chemical change.

I don't really get this question: Identify the combinations of chemicals in which chemical changes occurred.

If the chemical changes occured in all of the combinations, then what would be a good answer?

I get the second part which is: What evidence showed that chemical changes had occured. ~ New colour arose.

Since I don't know what chemicals were combined, I can't give an adequate answer.

A color change can be one indicator. Did anything else happen?

I hope this helps.

Cc

Xc

To answer the question of identifying the combinations of chemicals in which chemical changes occurred, you need to analyze the experimental data from your class experiment. Here's a step-by-step approach to find the answer:

1. Review your notes or experimental procedure: Go through any available documentation, such as your experiment notes or lab manual, to understand the combinations of chemicals that were used in the experiment.

2. Understand chemical changes: Chemical changes, also known as chemical reactions, are characterized by the formation of new substances with different properties. This can include changes in color, formation of precipitates, release of gas, or the absorption or release of heat.

3. Analyze the observations: Look back at your experimental observations for each combination of chemicals. Identify any evidence of chemical changes occurring during each combination. Specifically, focus on any changes in color, as you mentioned, as well as any other indicators mentioned in your experiment procedure or notes.

4. Determine the combinations with chemical changes: Based on your analysis, determine which combinations exhibited evidence of chemical changes. Note down the combinations where new colors arose or any other relevant indicators of chemical reactions occurred.

If it turned out that chemical changes occurred in all of the combinations, you can mention that as your answer. For example, you could say, "Chemical changes occurred in all of the combinations tested in the experiment."

Remember, the key is to analyze the experimental data and observations to identify the combinations where chemical changes occurred.